Self-cleaning, non-clogging, traveling grizzly



vSept. 8, 1931. Y E 1,822,739

SELF CLEANING, NON CLOGGING, TRAVELING GRIZZLY Filed Dec. 17. 1929 INVENTOR. Jimas Lien,

BY M ATTO E Patented Sept. 8, 1931 "UNITED STATES PATENT ol-rice JONAS LIEN, or roar WASHINGTON, NEW Yonk- SELF-CLEANING, 'uou-enoeeme, 'TRAVELING 'omzznr Original application filed July 18, 1929, Serial No. 379,257. Divided and "this application 'filed December 17,

1929. Serial No. 414,747.

This invention, which is a division of my application filed July 1'8, 1929, Serial Num but it is "to be understood that a grizzly, in.

accordance with this invention "may be employed in any connectionx-for which itis found applicable, such as screening and con- 30 veyingcoke, stone, gravel, clay, grain or any other materials subject "to screening, sizing or separation, and the invention has for its object to provide, in a manner as hereinafter set forth, a traveling grizzly so constructed and arranged to prevent, when active, the clogging thereof whereby the screening of the material is carried on without stoppage of the grizzly, under suchcohditiohs resulting in expeditious screening and conveying operations with a material saving in time,

labor andup-keep. 7

Further objects of the invention are to provide, in a manner as hereinafter set forth, a se'l'fioleaning, non c'logging, traveling-grizzly which is simple in itsconstructionand arrangement, strong, durable, thoroughly ellicient in its Use-,re'aGi Iy assembled and'comparatively inexpensive to-setup.

With the foregoing and other "objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to he understood that changes, variations and modifications can he resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several Views':--

Figurel is a top plan view of a traveling grizzly in accordance with this invention.

Figure 2 is a fragmentary view in side elevation and partly in section of a "traveling grizzly in accordance with this iin ve'ntion.

Figure 3 is a section on line 3* 3 Figure 2.

Figure 4 "is a diagrammatic view ill-ustrating'the shiftable and non shiftable positions of the screen or grate bars or fingers.

1 The grizzly includes an endless, traveling, combined screening and conveyor element of any desired length and ior-medfrom any de sired number of sets of screen or grate bars 6 arranged in spaced relation, the sets being disposed transversely of "the "line of travel thereof and with the number 0 16 the bars of each set depending upon the width desired of the combined screeningand conveyor element. The bars of one set are alternately disposed with respect-to the ofadjacent sets. The combinedscreenin g and conveyor element is adapted to be positioned within a hopper 1" having a dis'charge'fl" for the screened material and a discharge 3 for the screenings,-and with the discharge '2' spaced from the discharge 3 by a partition The materialto be screened or separated is suppliedio the hopper 1" and the screenings p ass through the combined screening and conveyor elementand areconducted ofi through the discharge "The sets of screen or gratebars npon which the material to be screened isdeposited rovide what may be termed agitators and have an upward movement impartedthereto and a downward movement by gravity whereby such movements will 'ex edit th screening and prevent theclogg-ing of the grizzly when he latter is active. The-aiternat'e screen or grate bars of each set are simultaneously ele vated. The bars ote'ach set are arranged in what may be termed two groups and with the bars "or" one group alternately disposed in spaced relation with respect to the bars of the other group. The roups are alternately elevated. v The height that one group of a set is elevated is greater than the height imparted to the other group of the set, or in other words, the gmte bars of each set are 7 links'ti atthe ends of thelatter.

of one set extend between the bars of an adjacent set, but the grate bars of each group of the groups of bars of each set are elevated simultaneously and lowered by gravity simul taneously. The screen or grate bars act to agitate the material not only that which is deposited upon such set but also that which is deposited .upon arear set. The upward and lowering movements of the screen ,or grate bars of the sets ex edite the screening and prevent the grizzly rom clogging.

Referring to the drawings the traveling, endless, combined screening and conveyor element includes a series of spaced, parallel shafts 1, the number of which depend upon the number of sets of screen or grate bars employed. The shafts 1 are spaced apart the desired distance. and are connected together at one end by inner and outer spacedpairs of links 4, respectively and at the other end by inner and outer spaced pairs of links 6, 7 respectively.- The links are pivotally mounted on the shafts. Thelinks 4 being alternately disposed with respect to links 5 and the links 6 are arranged in a like manner with respect to the links 7. i v 1 The ends of the links 5 are positioned against'the outer sides of the links 4 at the ends of the latter. I The ends of the links 7 are positioned aganist the outer sides of the The links 4, 5, 6 and 7 in connection with theends of the shafts l'providewhat may be termed a pair of cog chains driven in amanner to be hereinafter referred to, to provide for the travel of the combined screening and conveyor element.

Pivotally mounted. upon each shaft lies a set of spaced, parallel, independently shiftable screen or grate bars. .Each set consists of a plurality of bars 8 and a plurality of bars 9. The bars 8 are alternately disposed with respect to the bars 9. The bars extend 'rearwardly from the shafts 1. Each bar 8 comprises'a rectangular body portion 10 standing on its lower longitudinal edge 11. Projecting rearwardly from the upper rear corner of body portion 10 and disposed diagonally with respect to the latter is an arcuate extensionor nose 12. The rear end edge 13of body portion 10 extends rearwardly at an inclination from the lower edge. 11 to and merges into the bottom edge 14: of the arcuate extension or nose 12.

- The lower orbottom edge of body portion 10 has a forward straight part 15 and a rear part 16 which inclines downwardly from the rear end of part 15 of edge 11. The upper or top edge of body portion 10 is indicated at 17 jandit is disposed substantially parallel throughout to the part 15 of the bottom edge 11. The downwardly inclined part 16 of edge 11 provides the rear part 18 V of the body portion 10 of greater height than The bar 9con'1prises a rectangular body is shiftably mounted on portion 21 standing on its lower longitudinal edge and with the latter having its rear,.por tion 22 set back with respect to its forward portion 23. The upper longitudinal edge of the body portion 21 is indicated at 22 and which is disposed in the same plane throughout but parallel to the portions 22, 23 of the bottom edge whereby the rear portion 25 of the body portion 21 will-be of less width or height than the forward part thereof. Pros jecting rearwardly from the upper corner of the rear end 26 of the body portion 21 isan arcuate extensionor nose 27 which is disposed diagonally with respect to the body portion 21. The body portion21 at its forward end merges into a collar 28 of a length greatertha'n the thickness of body portion 21; The collar 28 is shiftablymounted on shaft 1. The setback part 22 of the bottom edge of body; portion 21 permits of the lowering of the bar 9 andthe portion 23 provides for the elevating of bar 9. r

The wide rear end part of the body por tion 10, ofbar 8 providesfor the elevation of the bar. The rear part18 of bar 8 is of greater height than the rear part 25 of bar 9Eand also of greater heigln or width, than theforwardpart of ban-.9. By this arrange.

ment, the bar 8 will be shifted upwardly. a greater distance than bar 9 when the bars contact or ride'against elevating means for the bars to be presently referred to. The body portionstlO and 21 are'disposed centraliy with respect to the The extensions or. noses 12 of the bars 8 of a forward set are adapted to seat on the collars of the bars 8 and 9 of a rear set, Th

extensions or noses 27 of the bars 9 of a forward set are adapted to set on the collars of the bars 8 and 9 of a rear set; The extension on a bar, of a forward set seats upon opposed ends of a pairof collars ofa rearset. The

body portions of the bars are integral with tho collars 20, 28 respectively.

collars at the transverse centers of the latter 7 whereby the extension on a bar of a forward set when seated will be arranged between two bars of rear set-and rest upon and overlap the opposed ends of. the collars of saidtwo bars or the rear set. By this arrangement the 'free end of a bar of a forward set will seat upon the pivoted ends of a pair of bars of a rear set". The seating of the noses is had on the upper stretch of the combined screening and conveyor element. The bars 9 of one set are elevated inadvance of bars 8, of such set due to the fact that the. bars 8 are engaged at their rear ends for elevation and the bars 9 are engaged intermediate their ends for elevation. The bars8. are alternately elevated withrespect to the elevating movement of the bars 9. The elevating and lowering movements of the bars 8 and 9 facilitate the screening action and prevent the combined screening and conveyor element from becoming clogged. The elevating and lowering action is. only had on the upper stretch of the element. The bars when ar ranged at the lower stretch of the element i are vertically disposed to permit of the quick passage of the screenings through such element and 1n this connectlon see Figure 2.

' The bars assume a horizontalposition at the upperstretch and a vertical position at the lower stretch of the element. When in horizontal position they constitute a support for conveying the material and also further act as a means for screening the material.

A drlve shaft is indicated at- 29 and 1s arranged at the discharge end of the combined screening and conveying element. The shaft 29 carries a pair of sprocket wheels 30, 31 for engagement between the pairs of links for the purpose of imparting a traveling movement to the combined screening and conveying element. At the rear end of the element a tail shaft 32 is provided and which carries a pair of sprockets 33 for engagement between the pairs of links. On the operation of the shaft 29, the sprockets 30, 31 acting upon the pairs of links will impart a traveling movement to the combined screening and conveying element. Suitable supports, not shown, are provided for the shafts 29, 32 and also for a series of abutments 34, 35 and 36 which are arranged between the shafts 29 and 32 and further disposed in parallel, spaced relation.

The abutments are in the form of bars or idlers free to rotate so as to minimize wear and are positioned in the path of the wider part of the body portions 10 and 21 of the bars 8, 9 respectively, for the purpose of elevating the bars at the upper stretch of the combinedscreening and conveyor element during the travel of the latter, undersuch conditions imparting an agitating action to the material which is to be screened and further to facilitate the screening operation and preventing the clogging of the grizzly.

The lower longitudinal edges of the body portions 10, 2'1 ride against the abutments 34, 35 and 36. Each abutment alternately operates the bars 8 and 9 of the set of bars. Al-

, though but three abutments are disclosed,,the

number thereof can be increased, depending upon the length of the combined screening and conveying element. During the travel of the latter, the bars at the discharge end thereof will assume the full line position.

shown in Figure 2 and further the bars. will assume the full line position at the bottom stretch as shown in Figure .2, and the. full.

line position at the rear end of the element as stretch of the element in a manneras shown inFigureQ.

The barsof aforward set are alternately arranged with respect to. thebars of a rear set and this arrangement further acts to facilitate'the screening operation and prevent the clogging of the grizzly. The hopper 1 is con-' structed in a manner to provide a clearance so that the traveling of the combined screening andhconveyor element will not be interfered wit It isthought the many advantages of a grizzly, in accordance with this invention and for the purpose set forth can be readily understood, particularly in view of the fact that the construction provides a se-lf cl'eaning, non-clog 'ing,traveling grizzly, and although the prefer-red embodiments. of the invention are as illustrated and described, yet it is to be understood that changes in the details of construction can be had which fall within the scope of the invention as claimed.

lVhat-I claim is 1. A grizzly comprising an endless, com

bined screening and conveying element ineluding simultaneously traveling sets of spaced screen bars, the rows of-bars of each of said sets disposed transversely of the line of travelthereo-f and one-set in advance of the other, and means for simultaneously elevating the alternate bars of each set when said set is at the upper stretch of said element on the forward travel of said stretch.

2. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen. bars, the rows of bars of each of said sets disposed transversely of the line of travel thereof and one set in advance of the other, and spaced abutment means positioned below and in proximity to the upper stretch of said element, each of the bars of each set of spaced bars provided with means coacting with said abutment means for elevating the alternate bars of each set when said set is at the upper stretch of said element on the forward travel of said stretch.

3. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen bars, the rows of bars of each of set is at the upper stretch of said element on the forward travel of said stretch, the said means being arranged within said element and acting simultaneously on the lower edges of the alternate bars of each set of spaced bars at the upper stretch of said element.

4. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen bars, the rows of bars of each of said sets disposed transversely of the line of travel thereof and one set in advance of the other, and spaced abutment means positioned below and in proximity to the upper stretch of said element, each of the bars of each set of spaced bars provided with means coacting with said abutment means for elevating thev alternate bars of each set when said set is at the upper'stretch of'said element on the forward travel of said stretch, the said means on said bars being at the bottom edge of each bar. 5. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen bars, the rows of bars of each of said sets disposed transversely of the line of travel thereof and one set in advance of the other, and spaced abutment means positioned below and in proximity" to the upper stretch of said element, each of the bars of each set I of spaced bars provided with means coacting with said abutment means for elevating the alternate bars of each set when said set is at the upper stretch of said element on the forward travelof said stretch, each of the bars of each set being independently and pivotally mounted at its inner end whereby the bar when arranged at the lower stretch of said-element will swing to a vertical position on the rearward travel of said lower stretch,

--'- each of the bars of each set of spaced bars having its outer end reduced, the reduced ends of the spaced bars of a forward set of spaced bars seating upon the pivoted ends of the spaced bars of a rear set of spaced bars at the upper stretch of said element.

6. A grizzly comprising an endless, combined screening and conveying element Including simultaneously 7 traveling sets of spaced screen bars, the rows of bars of each of i said sets disposed transversely of the line of travel thereof and one set in advance of the other, means for simultaneously elevating the alternate bars of each set when said set is at the upper stretch of said element on the forward travel of said stretch, each of the bars of each set be ng independent of the other bars and having its inner end in the form of a collar and its outer end reduced, the reduced end of a bar of a forward setseating when the bar T is at the upper stretch upon the collars of a pair of bars of a rear set, and a support for the collars of each set of spaced bars and upon which the collars are shiftably mounted 7 A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling set-s of spaced screen bars, the row of bars of said sets disposedtransversely of the line of travel thereof and one in advance of the other, each set consisting of two groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group of the set, and means for alternately elevating the groups of each set of spaced bars of those sets of spaced bars arranged at the upper stretch of said element on the forward travel of said stretch and with the spaced bars of one group shifted to a greater height than the spaced bars of the other group of the set.

8. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen bars, the row of bars of said sets disposed transversely of the line of travel thereof and one'in advance of the other, each set consisting of two groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group of the set, and means for alternately elevating the groups of each set of spaced bars of those sets of spaced bars arranged at the upper stretch of said element on the forward travel of said stretch and with the spaced bars of one group shifted to a greater height than the spaced bars of the other group of the set, said meansbeing arranged in prox imity to said upper stretch and contacting with thebottom edges of the bars of said sets.

9. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spacedscreen bars, the row of bars of said sets disposed transversely of the line of travel thereof and one in advance of the other, each set consisting of two groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group ofthe set, and means for alternately elevating the groups of each set'of spaced bars of those sets of spaced bars arranged at the upper stretch of said element on the forward travel of said stretch and with the spaced bars of one group shifted to a greater height than the spaced bars of the other group of the set, the bars of each of the groups of each set being loosely and pivotally mounted at their forward ends upon a common support therefor and having extensions at their rearward ends, the extensions of a forward set of'spaced'bars at the upper stretch of said element seating on the pivoted ends of a rear set of spaced bars at the upper stretch of said element.

10. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of space( screen bars, the row of bars of said scts disposed transversely of the line of travel thereof and one in advance of the other, each set consisting of two groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group of the set, and means for alternately elevating the groups of each set of spaced bars of these sets of spaced bars arranged at the upper stretch of said element on the forward travel of said stretch and with the spaced bars of one group shifted to a greater height than the spaced bars of the other group of the set, the spaced bars of one set sing alternately disposed with respect to the spaced bars of an adjacent set, the bars of each of the groups of each set being loosely and pivotally mounted at their inner ends upon a common support therefor and having extensions at their outer ends, the extension of a forward set of spaced bars at the upper stretch of said element seating on the pivoted ends of the bars of a rear set of bars at the upper stretch of said element, and the loosely and pivotally mounted ends of the bars of ach set of bars providing for said bars to assume a vertical position on the lower stretch of said element as said lower stretch travels rearwardly.

11. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets. of spaced screen bars, the rows of bars of said sets disposed transversely of the line of travel thereof and one in advance of the other, each set consisting of two groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group of the set, and means for alternately elevating the groups of each set of spaced bars of these sets of spaced bars arranged at the upper stretch of said element on the forward travel of said stretch and with the spaced bars of one group shifted to a greater height than the spaced bars of the other group of the set, the bars of each of the groups of each set being loosely and pivotally mounted upon a common support therefor whereby said bars will assume a vertical position with respect to their support when the said bars are carried rearwardly by the lower stretch of said support.

12. A grizzly comprising an endless, combined screening and conveying element including simultaneously traveling sets of spaced screen bars, the row of bars of said sets disposed transversely of the line of travel thereof and one in: advance. of the other, each; set consistingjof two groups of'spaced bars, the spaced barsof one group of cache setfbeialternately drlsposed in spaced: relation withrespect to the spaced barszof'the other 1 group of the set, spaced abutment means; be. low d inproxiinrity'to thei'ipper stretch. 0t

said element, each of the bar'szo'f'eaeh: group of bars-of each set providedion its lower-edge with. means --coacting" with: said: abutment means for alternately elevating the groilpsof each set of spaced: bars of these sets of spaced bars V arranged at said upper stretch on; the

cluding simultaneously traveling sets of spaced screen bars, the row of bars of saidsets disposed transversely of the line of travel thereof and one in advance of the other, each set consisting of two groups of spaced bars,

the spaced bars of one group of each set bealternately disposed in spaced relation with respect to the spaced bars of the other group of the set, each of the spaced bars of one group of each set having its outer portion of its body part of greater height than its inner portion and each of the spaced'bars of the other group of each set having its outer portion of'its body part of less height than the inner portion, each of the spaced bars of each of said sets having its inner end loosely and pivotally mounted upon a support common to all of the bars of the set, abutment means positioned below and in proximity to the upper stretch of said element and coacting with the bottom edges of the bars of said sets for alternately elevating the groups of each set of spaced bars of those sets of spaced bars arranged at said upper stretch on the forward travel of the latter.

14. A grizzly comprising an endless, comve-l' of the latter and with the bined screening and conveying element ineluding simultaneously traveling sets of spaced screen bars, said sets disposed transversely of the line of travel thereof and one in advanceof the other,.eachset consisting of two 5':

groups of spaced bars, the spaced bars of one group of each set being alternately disposed in spaced relation with respect to the spaced bars of the other group of the set, each of the spaced bars of one group of each set having its outer portion of its body part of greater height than its inner portion and each of the spaced bars of the other group of each set having its outer portion of its body part of less height than its inner portion, each of the spaced bars of each of said sets having its inner end loosely and pivotally mounted upon a support common to all of the bars of the set, abutment means positioned below and in proximity to the upper stretch of said elenient and coa cting with the bottom edges of the bars of said sets for alternately elevating-3 the groups of each set of spaced bars of those sets of spaced bars arranged at said upper stretch on the forward travel-of the latter, that group of bars of each set having higher outer portions being shifted by the latter to a greater extent than the shift imparted tothe bars of the other group of the set by the 5? outer portions of the bars of the second mentioned group.

In testimony whereof, I aflix my signature hereto,

" JONAS LIEN. 

